In article , BAC
writes

That Govt. definition is not relevant to this thread because clover is
not considered to be a pest in organic gardening.

But it was by the OP, who wanted rid of it?

By means of a herbicide, not a pesticide. A selective herbicide at that
which would not harm his grass. Grass too may or may not be seen as an
welcome plant depending on the circumstances, but it is not a pest.
--
Alan & Joan Gould - North Lincs.